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A kind of iron-based optical variable pigment and its manufacture method and application

A pigment and iron-based technology, which is applied in the field of iron-based optically variable pigments and its manufacturing, can solve the problems of increasing manufacturing costs, achieve better sub-peak absorption, compensate for the decline in color information, and reduce manufacturing costs.

Active Publication Date: 2022-03-18
广东晟铂纳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain sufficiently high reflectivity and color saturation, all-dielectric optically variable pigments often require a large number of film layers to be laminated, which will inevitably increase the manufacturing cost

Method used

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  • A kind of iron-based optical variable pigment and its manufacture method and application
  • A kind of iron-based optical variable pigment and its manufacture method and application
  • A kind of iron-based optical variable pigment and its manufacture method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0039] An iron-based optically variable pigment, comprising: an iron oxide central layer, multiple high-refractive-index layers, and multiple low-refractive-index layers; multiple high-refractive-index layers and multiple low-refractive-index layers are alternately stacked and arranged symmetrically on The upper and lower main surfaces of the iron oxide central layer; multiple cavity structures are arranged inside the iron oxide central layer.

[0040] It should be noted that the material of the high refractive index layer can be at least one of titanium dioxide, hafnium dioxide, tantalum pentoxide, zirconium dioxide, zinc sulfide, or other transparent dielectric materials with a refractive index higher than 2.0; low refractive index The material of the index layer can be one of silicon dioxide, aluminum oxide, magnesium fluoride or a mixture thereof, or any other low-refractive-index material whose refractive index is less than 1.65. The iron oxide center layer may be ferrous...

Embodiment 2

[0045] An iron-based optically variable pigment, see figure 1 , the iron-based optically variable pigment has a red-to-golden optically variable pigment structure. The film layer in the figure is only a schematic diagram of the number of layers. The middle layer is an iron oxide center layer made of ferrous oxide material, and the upper side is set with a silicon dioxide material with a low refractive index. layer, the low refractive index layer of silicon dioxide material is set on the high refractive index layer of titanium dioxide material, so that the high and low refractive index layers are arranged alternately, six layers are arranged on the upper side, and the same six layers are symmetrical on the lower side, and the material and thickness of the same distance on both sides are equal Symmetrical distribution. The specific film layer arrangement is shown in Table 1:

[0046] Table 1: Layer structure and thickness parameters of the di-iron-based optically variable pigme...

Embodiment 3

[0055] An iron-based optically variable pigment, see Figure 4 , the iron-based optically variable pigment is a green-to-blue optically variable pigment structure. The film layer in the figure is only a schematic diagram of the number of layers. The iron oxide center layer prepared by ferric oxide material is used in the middle, and silicon dioxide material is arranged on the upper side. Low-refractive index layer, low-refractive-index material silicon dioxide layer is set on high-refractive-index material titanium dioxide layer, so that high-refractive-index material film layers are arranged alternately, three layers are arranged on the upper side, and the same three layers are symmetrically arranged on the lower side, and the distance on both sides is the same The material and thickness are distributed symmetrically. The specific film layer arrangement is shown in Table 3:

[0056] Table 3: Example three iron-based optical variable pigment layer structure and thickness para...

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Abstract

The invention discloses an iron-based optical variable pigment, a manufacturing method and application thereof, and belongs to the technical field of optical variable pigments. The iron-based light-variable pigment includes: an iron oxide central layer, multiple high-refractive-index layers and multiple low-refractive-index layers; multiple high-refractive-index layers and multiple low-refractive-index layers are stacked alternately, symmetrically arranged on the iron The main surfaces on the upper and lower sides of the oxide central layer; multiple cavity structures are arranged inside the iron oxide central layer. The present invention proposes an all-dielectric optically variable pigment composed of iron oxide material as a symmetrical central layer and high and low refractive index transparent medium materials, using iron oxide to increase the degree of freedom of color regulation, and a cavity is arranged inside the iron oxide central layer structure, so when the viewing angle changes, the color of the optically variable pigment will change significantly, which can provide bright color information, and solve the problem that the optically variable pigment of all dielectric materials requires multi-layer film deposition to achieve higher saturation problems and reduce manufacturing costs.

Description

technical field [0001] The invention relates to the technical field of optically variable pigments, in particular to an iron-based optically variable pigment and its manufacturing method and application. Background technique [0002] Optically variable pigments, based on the principle of thin film interference, show that the color of the pigment changes with the change of the viewing angle. Due to its non-reproducible optical effects and dynamic color changes, it is widely used in the field of anti-counterfeiting coatings and special effect pigments. In the field of optically variable pigments, the structure of traditional optically variable pigments is based on the Fabry-Perot five-layer symmetrical structure Cr / MgF2 / AL / MgF2 / Cr of metal dielectric materials, but heavy metal materials such as chromium and nickel are often used as half-layers in this structural material. The absorbing layer has potential hidden dangers to environmental safety. [0003] Another class of optic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/28
CPCG02B5/286
Inventor 周大坚
Owner 广东晟铂纳新材料科技有限公司
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